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Studying the process of galaxy formation in situ

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Studying the process of galaxy formation in situ Powered By Docstoc
					Formation & Evolution offormation StudyingGas & Dark Matter, Chemical & Dynamical Evolution in situ the process of galaxy Galaxies Stars,
Color Magnitude Diagrams & LFs of resolved galaxies Chemical evolution models Elemental abundances of stars & gas Distribution & kynematics of gas in disks & halos - galaxy rotation curves

Search & study of the relics of galaxy formation

The Cosmic Evolution of Baryons

The Cosmic Evolution of galactic Structures

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

Staff : M. Bellazzini (AR), L. Federici (AR), F. Fusi Pecci (AO), L. Origlia (AR), R. Sancisi (AO), M. Tosi (AO) Post Doc: E. Pancino, D. Romano PhD Students: L. Angeretti, F. Fraternali, S. Galleti, L. Monaco, A. Sollima Technical Support: P. Montegriffo, E. Rossetti

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

A short panoramic view
A few examples

Some highlights

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

Star Formation Histories from synthetic CMDs
The most widely used method to infer SFH of resolved galaxie was invented here

Tosi et al. 1991

Spatially resolved SFH in the local Universe
Deep, high-res photometry allows to resolve stellar populations and derive CMDs. From them, the method provides SF history and IMF.
M. Tosi (OAB), L. Angeretti (Uni.Bo), L.Greggio (OAPd), F.Annibali (SISSA), A. Aloisi (STScI), C. Leitherer (STScI)

e.g. NGC1705 BCD at 5.1 Mpc HST-WFPC2/NIC2 data

7 6

5

4

3

2

1

0

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

The disk and the halo of M31 with HST
S. Galleti L. Federici F. Fusi Pecci C. Cacciari M. Bellazzini

Tomography of the stellar content

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

Chemical enrichment by recursive bursts of SF
Stellar abundances from NIR spectra
NICS @ TNG

M82 the nuclear SB

Gas abundances from X-ray spectra
XMM

2keV

1keV

0.7keV

People: Origlia, Comastri, OA-BO Ranalli, Uni-BO Maiolino , OA-Arcetri

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

Omega Cen:the Rosetta Stone of chemical evolution Omega Cen: the relic of a galactic building block?
ESO SOFI >> 400000 stars stars HST ACS 40000 stars WFI@2.2m > 220000
Metal Content

Abundance Analysis

SOFI: NIR – MR spectroscopy
AGE AGE

UVES Optical Hi Res Spectroscopy

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

Omega Cen:the Rosetta Stone of chemical evolution

Flames & UVES
130 SGB stars at low res.

More than 700 RGB stars at high res.

E. Pancino M. Bellazzini L. Origlia A. Sollima F. Ferraro (Un.)

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution
The key interpretative tool for the observations of the chemical enrichment

Models of chemical evolution in galaxies
An example: primordial nucleosynthesis The predictions of our models on Deuterium verified by WMAP

Comparisons of this kind will soon be possible also in nearby external galaxies (UVES-Flames)
M. Tosi, D. Romano

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

The relics of the hyerarchical merging process Local detailed test of the CDM cosmology The Sagittarius Dwarf galaxy

M. Bellazzini, L. Monaco, E. Pancino; F. Ferraro, R. Ibata

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

The Sagittarius Dwarf galaxy

The Main Body
SGR: a nucleated galaxy at 25 kpc WFI photometry of a 1 deg X 1 deg field (500000 stars): SFH & structure VLT-Flames spectra of more than 300 stars: abundance & dynamics

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

Sgr Dwarf galaxy: The Stream

Globular Clusters in the Sgr Stream The contribution of Sgr to the assembly of the Galactic Halo

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution
The relics of the hyerarchical merging process Local detailed test of the CDM cosmology

The discovery of the Canis Major galaxy: The relic of an in-plane accretion onto the MW
Overdensity of M giants Substructure of GCs

CMD from archive data

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

The discovery of the Canis Major galaxy: The relic of an in-plane accretion onto the MW
Kynematics & SFH: constraints to galaxy formation models Stream Kynematics: detailed contraints on the Galactic potential DM cusps & streams: impact on neutralino search experiments

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

Gas kynematics & the structure of gaseous discs
Gas disc & velocity fields

HVC in external galaxies

Substructures in gaseous discs
R. Sancisi F. Fraternali

Velocity curves & Mass profiles

NGC 6946

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

ESO others: 9 nights

TELESCOPE TIME
2000-2003

ESO VLT: 21 nights

HST: 177 orbits
Keck: 3 nights

TNG: 21 nights

Westerbork: 40 X 12h

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

Grant Euros N. P.I. Type
Cofin 98 Cofin 98 Cofin 00 Cofin 00 Cofin 01 Cofin 02 Cofin 03 54000 40000 107400 50000 62500 98400 84000 Castellani Danziger Tornambé Danziger Gratton Tosi Gratton par tot par tot n/tot par par

ASI 98-02
TOT

35000
531300

Tosi

tot

Publications
Invited talks 1998-2003: 10

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

An expanding field
What we need short/medium term
(or the keys of our expansion)

Access to grants (COFIN)
PhD Students International collaborations
What we need long term
Italian participation to large long-term programmes as SDSS, 2MASS

Access to key facilities
VLT, HST, JWT

Technical support
Software developement

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution

Formation & Evolution of Galaxies
Stars, Gas & Dark Matter, Chemical & Dynamical Evolution


				
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